/*******************************************************************************
 * Copyright (c) 1991, 2014 IBM Corp. and others
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution and
 * is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following
 * Secondary Licenses when the conditions for such availability set
 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
 * General Public License, version 2 with the GNU Classpath
 * Exception [1] and GNU General Public License, version 2 with the
 * OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] http://openjdk.java.net/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 *******************************************************************************/
package com.ibm.j9ddr.vm29.view.dtfj.java.j9;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.NoSuchElementException;

@SuppressWarnings("unchecked")
public class SlidingIterator implements Iterator {
	private final ArrayList data;
	private final int end;
	private int current;
	
	public SlidingIterator(ArrayList src, int start, int end) {
		data = src;
		this.end = end;
		current = start;
	}

	public boolean hasNext() {
		return current < end;
	}

	public Object next() {
		if(hasNext()) {
			Object obj = data.get(current);
			current++;
			return obj;
		} else {
			throw new NoSuchElementException("There are no more available elements");
		}
	}

	public void remove() {
		throw new UnsupportedOperationException("This iterator is read only");
	}

}
